Wow, but they sure can fly back and forth between Salem & Chicago and set landspeed records, can't they?

Aren't they supposed to be within driving distance of each other?

Also, when did Chicago start being mentioned so often on this show? It seems like it's been going on for a few years, but if it was mentioned before then I strangely have absolutely no recollection of it. I have only been watching DAYS since the early/mid-90s. Has Salem historically been a Midwestern city or is that a recent development?